JPH08136881A - Liquid crystal projector - Google Patents
Liquid crystal projectorInfo
- Publication number
- JPH08136881A JPH08136881A JP6270899A JP27089994A JPH08136881A JP H08136881 A JPH08136881 A JP H08136881A JP 6270899 A JP6270899 A JP 6270899A JP 27089994 A JP27089994 A JP 27089994A JP H08136881 A JPH08136881 A JP H08136881A
- Authority
- JP
- Japan
- Prior art keywords
- light
- liquid crystal
- crystal display
- reflector
- mirror
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Landscapes
- Projection Apparatus (AREA)
- Liquid Crystal (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】この発明は液晶プロジェクタに関
し、特に光源の光に含まれ、従来無駄になっていた非可
視光の有効利用に係わる。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal projector, and more particularly to the effective use of invisible light contained in the light of a light source and wasted conventionally.
【0002】[0002]
【従来の技術】従来の液晶プロジェタク1を図5を用い
て説明する。3は液晶表示素子、4は液晶表示素子3を
駆動する画像信号回路、5は液晶表示素子3の背面側に
配された光源(ランプ)、6は光源5の光を集光し、そ
の光に含まれる可視光Laを液晶表示素子3の背面に反
射させ、前記光に含まれる非可視光Lbを透過させて逃
し、可視光Laと分離するコールドミラー・リフレク
タ、7は液晶表示素子3の前面側に配され、該素子3の
透過光Lcをスクリーンへ拡大投影する投影レンズ、8
は電源回路、9は冷却用ファンであり、これらの要部が
筐体2に収容されている。2. Description of the Related Art A conventional liquid crystal projector 1 will be described with reference to FIG. Reference numeral 3 is a liquid crystal display element, 4 is an image signal circuit for driving the liquid crystal display element 3, 5 is a light source (lamp) arranged on the back side of the liquid crystal display element 3, and 6 is light from the light source 5. Is a cold mirror reflector for reflecting visible light La contained in the back surface of the liquid crystal display element 3 and transmitting non-visible light Lb contained in the light to escape and separating the visible light La from the visible light La, and 7 is a liquid crystal display element 3 A projection lens 8 arranged on the front side for magnifying and projecting the transmitted light Lc of the element 3 onto the screen,
Is a power supply circuit, 9 is a cooling fan, and these main parts are housed in the housing 2.
【0003】[0003]
【発明が解決しようとする課題】従来の液晶プロジェク
タ1では、コールドミラー・リフレクタ6で分離された
非可視光Lbは特に利用されることなく、筐体2の内部
に逃がされ、温度上昇の原因の一つになっていた。また
この温度上昇を押えるために、消費電力の大きな大型の
ファン9が必要であった。In the conventional liquid crystal projector 1, the invisible light Lb separated by the cold mirror / reflector 6 is not particularly used and is released to the inside of the housing 2 to increase the temperature. It was one of the causes. Moreover, in order to suppress this temperature rise, a large fan 9 with large power consumption was required.
【0004】この発明はこのような事情に鑑みてなされ
たものであり、その目的は光源の光に含まれ、従来無駄
となっていた非可視光Lbのエネルギーを有効利用しよ
うとするものである。The present invention has been made in view of the above circumstances, and an object thereof is to effectively utilize the energy of the invisible light Lb which is contained in the light of the light source and has conventionally been wasted. .
【0005】[0005]
(1)請求項1の発明では、コールドミラー・ソフレク
タで分離された非可視光Lbを受光して電力に変換し、
その電力を画像信号回路4に供給する太陽電池が設けら
れる。 (2)請求項2の発明では、前記(1)において、液晶
表示素子3の背面側に配され、コールドミラー・リフレ
クタ6で分離された非可視光Lbを前記太陽電池に反射
させる反射鏡が設けられる。(1) According to the first aspect of the invention, the invisible light Lb separated by the cold mirror deflector is received and converted into electric power,
A solar cell that supplies the power to the image signal circuit 4 is provided. (2) In the invention of claim 2, in the above (1), a reflecting mirror which is disposed on the back side of the liquid crystal display element 3 and reflects the invisible light Lb separated by the cold mirror reflector 6 to the solar cell. It is provided.
【0006】(3)請求項3の発明では、前記(2)に
おいて、前記反射鏡が光源5の中心線Loを軸心に置い
て配された凹面鏡で構成され、その中心に、コールドミ
ラー・リフレクタ6で反射された可視光Laを透過させ
る透孔が形成されている。(3) In the invention of claim 3, in the above (2), the reflecting mirror is composed of a concave mirror arranged with the center line Lo of the light source 5 at the axis, and a cold mirror, A through hole for transmitting the visible light La reflected by the reflector 6 is formed.
【0007】[0007]
【実施例】この発明の実施例を図1に、図5と対応する
部分に同じ符号を付して示し、重複説明を省略する。こ
の発明では、太陽電池10を設け、コールドミラー・リ
フレクタ6で分離された非可視光Lbを受光して電力に
変換し、その電力を画像信号回路4に供給する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention is shown in FIG. 1 by giving the same reference numerals to the portions corresponding to those in FIG. In the present invention, the solar cell 10 is provided, the invisible light Lb separated by the cold mirror / reflector 6 is received and converted into electric power, and the electric power is supplied to the image signal circuit 4.
【0008】太陽電池10はこの例では10a〜10e
より成り、それぞれの発生電圧は低いので、図3に示す
ように直列接続されて必要な大きさにされている。図1
Bの例では、反射鏡の一種である凹面鏡11が液晶表示
素子3の背面側に配される。凹面鏡11は光源5の中心
線Loを軸心に置いて配され、その反射面は放物面また
は楕円面とされ、その中心にコールド・ミラー・リフレ
クタ6で反射された可視光Laをそのまま透過させる透
孔11aが設けられている。コールドミラー・リフレク
タ6で分離された非可視光Lbの一部は凹面鏡11で反
射されて太陽電池10に入射される。従って、図1Aの
場合よりも大きな電力を得ることができる。The solar cell 10 is 10a to 10e in this example.
Since the respective generated voltages are low, they are connected in series as shown in FIG. 3 to have a required size. FIG.
In the example of B, the concave mirror 11 which is a kind of reflecting mirror is arranged on the back side of the liquid crystal display element 3. The concave mirror 11 is arranged with the center line Lo of the light source 5 at the axis, and its reflecting surface is a parabolic surface or an elliptical surface, and the visible light La reflected by the cold mirror reflector 6 is directly transmitted to the center thereof. A through hole 11a is provided. A part of the invisible light Lb separated by the cold mirror / reflector 6 is reflected by the concave mirror 11 and is incident on the solar cell 10. Therefore, it is possible to obtain larger power than in the case of FIG. 1A.
【0009】[0009]
(1)コールドミラー・リフレクタ6で分離された非可
視光Lbはかなりの量が電気エネルギーに変換されるの
で、電源回路8の容量を小さくすることができる。 (2)非可視光Lbから熱に変換される量が少くなり、
筐体内の温度上昇が押えられるので、冷却用ファン9を
小型にすることができる。 (3)前記電源回路8の小容量化及び冷却用ファンの小
型化によって、液晶プロジェクタの消費電力を従来より
かなり少なくすることができる。(1) Since a considerable amount of the invisible light Lb separated by the cold mirror reflector 6 is converted into electric energy, the capacity of the power supply circuit 8 can be reduced. (2) The amount of non-visible light Lb converted into heat is small,
Since the temperature rise in the housing is suppressed, the cooling fan 9 can be downsized. (3) By reducing the capacity of the power supply circuit 8 and downsizing the cooling fan, the power consumption of the liquid crystal projector can be considerably reduced as compared with the conventional one.
【図1】この発明の実施例を示す原理的な構成図。FIG. 1 is a principle configuration diagram showing an embodiment of the present invention.
【図2】図1の太陽電池10の配置を示す斜視図。FIG. 2 is a perspective view showing an arrangement of solar cells 10 in FIG.
【図3】図1の太陽電池10と画像信号回路4の結線
図。FIG. 3 is a connection diagram of the solar cell 10 and the image signal circuit 4 of FIG.
【図4】図1Bの凹面鏡11の斜視図。FIG. 4 is a perspective view of the concave mirror 11 of FIG. 1B.
【図5】従来の液晶プロジェクタの原理的な構成図。FIG. 5 is a principle configuration diagram of a conventional liquid crystal projector.
Claims (3)
素子を駆動する画像信号回路と、前記液晶表示素子の背
面側に配された光源と、 その光源の光を集光し、その光に含まれる可視光を前記
液晶表示素子の背面に反射させ、前記光に含まれる非可
視光を透過させることにより前記可視光と分離するコー
ルドミラー・リフレクタと、 前記液晶表示素子の前面側に配され、該素子の透過光を
スクリーンへ拡大投影する投影レンズと、 を具備する液晶プロジェクタにおいて、 前記コールドミラー・リフレクタで分離された非可視光
を受光して電力に変換し、その電力を前記画像信号回路
に供給する太陽電池を設けたことを特徴とする液晶プロ
ジェクタ。1. A transmissive liquid crystal display device, an image signal circuit for driving the liquid crystal display device, a light source arranged on the back side of the liquid crystal display device, and light from the light source is condensed to obtain the light. A visible light contained in the liquid crystal display element is reflected on the back surface of the liquid crystal display element, and a non-visible light contained in the light is transmitted to separate the visible light from a cold mirror reflector; A projection lens for enlarging and projecting the transmitted light of the element onto a screen; and a liquid crystal projector comprising: receiving invisible light separated by the cold mirror reflector and converting it into electric power, and converting the electric power into the image. A liquid crystal projector comprising a solar cell for supplying a signal circuit.
背面側に配され、前記コールドミラー・リフレクタで分
離された非可視光を前記太陽電池に反射させる反射鏡を
設けたことを特徴とする液晶プロジェクタ。2. The reflecting mirror according to claim 1, further comprising a reflecting mirror disposed on the back side of the liquid crystal display device, the reflecting mirror reflecting invisible light separated by the cold mirror reflector to the solar cell. LCD projector.
源の中心線を軸心に置いて配された凹面鏡で構成され、
その中心に、前記コールドミラー・リフレクタで反射さ
れた前記可視光を透過させる透孔が形成されていること
を特徴とする液晶プロジェクタ。3. The concave mirror according to claim 2, wherein the reflecting mirror is a concave mirror arranged with a center line of the light source as an axis.
A liquid crystal projector having a through hole formed in the center thereof for transmitting the visible light reflected by the cold mirror reflector.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6270899A JPH08136881A (en) | 1994-11-04 | 1994-11-04 | Liquid crystal projector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6270899A JPH08136881A (en) | 1994-11-04 | 1994-11-04 | Liquid crystal projector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH08136881A true JPH08136881A (en) | 1996-05-31 |
Family
ID=17492536
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6270899A Withdrawn JPH08136881A (en) | 1994-11-04 | 1994-11-04 | Liquid crystal projector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH08136881A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7699475B2 (en) * | 2006-06-02 | 2010-04-20 | Hon Hai Precision Industry Co., Ltd. | Deviating light retrieving optical projector system |
US7824040B2 (en) | 2007-10-17 | 2010-11-02 | Hon Hai Precision Industry Co., Ltd. | Projector and light source assembly employed in same |
-
1994
- 1994-11-04 JP JP6270899A patent/JPH08136881A/en not_active Withdrawn
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7699475B2 (en) * | 2006-06-02 | 2010-04-20 | Hon Hai Precision Industry Co., Ltd. | Deviating light retrieving optical projector system |
US7824040B2 (en) | 2007-10-17 | 2010-11-02 | Hon Hai Precision Industry Co., Ltd. | Projector and light source assembly employed in same |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20020115 |